Stage 6 mini LCD Rev/Tacho

Hi Guys, Just need a little help, just fitted a Parmakit electronic ignition to my classic 150cc Vespa, but I can’t get the Stage 6 mini LCD Rev/Tacho to work with it. At idle the Stage 6 reads 5000rpm, all the correct settings are imputed. I know the Stage 6 works as with the old electronic ignition it worked fine. Do I need another part for the stage 6 to work? Or do I need to use a different setting for it. Any help would be much appreciated. Thanks